Idler Pulley – Fits Volvo Penta D4 & D6 Series (180-435HP) (Replaces 3847482)
Idler Pulley – Fits Volvo Penta D4 & D6 Series (180-435HP) (Replaces 3847482) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Idler Pulley – Fits Volvo Penta D4 & D6 Series (180-435HP) (Rep...
Product Details
This aftermarket Idler Pulley is engineered for Volvo Penta D4 (180–300 HP) and D6 (280–435 HP) series 4-stroke diesel engines, covering models from 2003 to the present. It ensures proper belt tension and alignment for reliable engine performance.
It serves as a direct replacement for Volvo Penta part number 3847482.
- Features a direct bolt-on design for straightforward installation.
- Constructed from high-grade durable materials for longevity.
- Includes a 1-year aftermarket warranty against manufacturing defects.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3847482 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Volvo Penta | D4-180I-B | 180 | 4-Stroke | 2005–2008 | 3847482 |
| Volvo Penta | D4-180I-C | 180 | 4-Stroke | 2008–2009 | 3847482 |
| Volvo Penta | D4-180I-D | 180 | 4-Stroke | 2009–2010 | 3847482 |
| Volvo Penta | D4-180I-E | 180 | 4-Stroke | 2010 | 3847482 |
| Volvo Penta | D4-210I-A | 210 | 4-Stroke | 2003–2004 | 3847482 |
| Volvo Penta | D4-210I-B | 210 | 4-Stroke | 2004–2006 | 3847482 |
| Volvo Penta | D4-225I-B | 225 | 4-Stroke | 2005–2008 | 3847482 |
| Volvo Penta | D4-225I-C | 225 | 4-Stroke | 2008–2009 | 3847482 |
| Volvo Penta | D4-225I-D | 225 | 4-Stroke | 2009–2010 | 3847482 |
| Volvo Penta | D4-260I-A | 260 | 4-Stroke | 2004 | 3847482 |
| Volvo Penta | D4-260I-B | 260 | 4-Stroke | 2004–2008 | 3847482 |
| Volvo Penta | D4-260I-C | 260 | 4-Stroke | 2008–2009 | 3847482 |
| Volvo Penta | D4-260I-D | 260 | 4-Stroke | 2009–2010 | 3847482 |
| Volvo Penta | D4-260I-E | 260 | 4-Stroke | 2010 | 3847482 |
| Volvo Penta | D4-300I-A | 300 | 4-Stroke | 2007–2008 | 3847482 |
| Volvo Penta | D4-300I-C | 300 | 4-Stroke | 2008–2009 | 3847482 |
| Volvo Penta | D4-300I-D | 300 | 4-Stroke | 2009–2010 | 3847482 |
| Volvo Penta | D6-280A-A | 280 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-280A-B | 280 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-280A-C | 280 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-280A-D | 280 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-280A-E | 280 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-280I-A | 280 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-280I-B | 280 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-280I-C | 280 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-280I-D | 280 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-280I-E | 280 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-300A-F | 300 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-300D-F | 300 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-300I-F | 300 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-310A-A | 310 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-330A-F | 330 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-330D-F | 330 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-330I-F | 330 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-370A-F | 370 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-370D-F | 370 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-370I-F | 370 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-400A-F | 400 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-435D-F | 435 | 4-Stroke | 2003–present | 3847482 |
| Volvo Penta | D6-435I | 435 | 4-Stroke | 2003–present | 3847482 |
Technical Specs
- Product Type
- Idler Pulley
- Installation
- Direct bolt-on
- Housing Material
- High-grade durable materials
- Weight
- 0.31 kg (0.68 lbs)
- Warranty
- 1-year (aftermarket)
What’s in the Box
- 1 x Idler Pulley (3847482)
Installation Notes
- Disconnect the battery cables and ensure the engine has completely cooled.
- Locate the belt tensioner and use a wrench to release the tension on the serpentine belt, then slide the belt off the idler pulley.
- Remove the center bolt holding the old idler pulley in place and remove the pulley.
- Thoroughly clean the pulley mounting surface on the engine block or bracket.
- Install the new idler pulley, ensuring it is seated correctly.
- Thread the mounting bolt by hand, then tighten it to the manufacturer-specified torque—do not overtighten.
- Reinstall the serpentine belt, confirming it is correctly routed on all pulleys according to the engine diagram.
- Carefully re-applyENSION to the belt using the tensioner.
- Reconnect the battery, start the engine, and listen for abnormal noises while checking for proper belt tracking.
Troubleshooting & FAQ
How do I know if this idler pulley fits my engine?
This pulley fits Volvo Penta D4 and D6 series diesel engines (2003–present). It is a direct alternative to OEM part 3847482. Always cross-reference your part number and check the detailed compatibility list on this page to ensure a perfect match.
What are the signs of a failing idler pulley?
Common symptoms include a persistent squealing, chirping, or grinding noise from the engine area, visible wobble in the pulley as it spins, or uneven wear on your serpentine belt. A visual inspection may also reveal cracks or bearing grease leakage.
When should an idler pulley be replaced?
While there is no fixed replacement interval, it is best practice to inspect idler pulleys during every belt change. We recommend immediate replacement if you notice any bearing noise, resistance when spinning by hand (with the belt off), or physical damage.
Can I install this pulley myself?
Yes, installation is a direct bolt-on process for those with mechanical experience. It requires releasing belt tension, unbolting the old pulley, and torquing the new one to spec. However, professional installation is always recommended to ensure safety and correct function.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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